Dental cartridge auto-injector with protective needle cover

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/20 (2006.01)

Patent

CA 2234996

An injection device includes a generally tubular outer body (10) and a medicament cartridge assembly carried within the outer body. The cartridge assembly includes a glass container (14), a charge of medicament (36) disposed within the glass container, a plunger member (28) rearwardly confining the medicament, and a seal (22) for sealing the forward portion of the glass container. A needle (34) has a rearward end disposed proximate the seal, with the seal and needle being movable with respect to one another. A rigid needle cover member (40) is normally maintained in an inoperative position and is movable relative to said body to a protective position wherein the needle cover member extends forwardly to cover the forward end of the needle.

Dispositif d'injection comprenant un corps (10) externe de forme générale tubulaire et un ensemble formant cartouche à médicament reçu à l'intérieur du corps externe. L'ensemble formant cartouche comprend un réservoir en verre (14), une dose de médicament (36) placée à l'intérieur de ce réservoir en verre, un élément piston (28) enfermant le médicament à l'arrière, et un obturateur (22) obturant la partie antérieure du réservoir en verre. L'aiguille (34) présente une extrémité postérieure située au voisinage de l'obturateur, et l'obturateur et l'aiguille sont mobiles l'un par rapport à l'autre. Un élément rigide (40) adapté pour protéger l'aiguille est normalement maintenu en position de repos, et il peut se déplacer par rapport audit corps pour venir se placer dans une position de protection dans laquelle il s'étend vers l'avant et protège l'extrémité antérieure de l'aiguille.

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